Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net-sysfs.c - network device class and attributes |
| 3 | * |
| 4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 12 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/netdevice.h> |
| 15 | #include <linux/if_arp.h> |
| 16 | #include <net/sock.h> |
| 17 | #include <linux/rtnetlink.h> |
| 18 | #include <linux/wireless.h> |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 19 | #include <net/iw_handler.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | static const char fmt_hex[] = "%#x\n"; |
David S. Miller | d1102b5 | 2005-05-29 20:28:25 -0700 | [diff] [blame] | 22 | static const char fmt_long_hex[] = "%#lx\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | static const char fmt_dec[] = "%d\n"; |
| 24 | static const char fmt_ulong[] = "%lu\n"; |
| 25 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 26 | static inline int dev_isalive(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | { |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 28 | return dev->reg_state <= NETREG_REGISTERED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | /* use same locking rules as GIF* ioctl's */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 32 | static ssize_t netdev_show(const struct device *dev, |
| 33 | struct device_attribute *attr, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | ssize_t (*format)(const struct net_device *, char *)) |
| 35 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 36 | struct net_device *net = to_net_dev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | ssize_t ret = -EINVAL; |
| 38 | |
| 39 | read_lock(&dev_base_lock); |
| 40 | if (dev_isalive(net)) |
| 41 | ret = (*format)(net, buf); |
| 42 | read_unlock(&dev_base_lock); |
| 43 | |
| 44 | return ret; |
| 45 | } |
| 46 | |
| 47 | /* generate a show function for simple field */ |
| 48 | #define NETDEVICE_SHOW(field, format_string) \ |
| 49 | static ssize_t format_##field(const struct net_device *net, char *buf) \ |
| 50 | { \ |
| 51 | return sprintf(buf, format_string, net->field); \ |
| 52 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 53 | static ssize_t show_##field(struct device *dev, \ |
| 54 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 56 | return netdev_show(dev, attr, buf, format_##field); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | |
| 60 | /* use same locking and permission rules as SIF* ioctl's */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 61 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | const char *buf, size_t len, |
| 63 | int (*set)(struct net_device *, unsigned long)) |
| 64 | { |
| 65 | struct net_device *net = to_net_dev(dev); |
| 66 | char *endp; |
| 67 | unsigned long new; |
| 68 | int ret = -EINVAL; |
| 69 | |
| 70 | if (!capable(CAP_NET_ADMIN)) |
| 71 | return -EPERM; |
| 72 | |
| 73 | new = simple_strtoul(buf, &endp, 0); |
| 74 | if (endp == buf) |
| 75 | goto err; |
| 76 | |
| 77 | rtnl_lock(); |
| 78 | if (dev_isalive(net)) { |
| 79 | if ((ret = (*set)(net, new)) == 0) |
| 80 | ret = len; |
| 81 | } |
| 82 | rtnl_unlock(); |
| 83 | err: |
| 84 | return ret; |
| 85 | } |
| 86 | |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 87 | NETDEVICE_SHOW(addr_len, fmt_dec); |
| 88 | NETDEVICE_SHOW(iflink, fmt_dec); |
| 89 | NETDEVICE_SHOW(ifindex, fmt_dec); |
| 90 | NETDEVICE_SHOW(features, fmt_long_hex); |
| 91 | NETDEVICE_SHOW(type, fmt_dec); |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 92 | NETDEVICE_SHOW(link_mode, fmt_dec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | /* use same locking rules as GIFHWADDR ioctl's */ |
| 95 | static ssize_t format_addr(char *buf, const unsigned char *addr, int len) |
| 96 | { |
| 97 | int i; |
| 98 | char *cp = buf; |
| 99 | |
| 100 | for (i = 0; i < len; i++) |
| 101 | cp += sprintf(cp, "%02x%c", addr[i], |
| 102 | i == (len - 1) ? '\n' : ':'); |
| 103 | return cp - buf; |
| 104 | } |
| 105 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 106 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
| 107 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { |
| 109 | struct net_device *net = to_net_dev(dev); |
| 110 | ssize_t ret = -EINVAL; |
| 111 | |
| 112 | read_lock(&dev_base_lock); |
| 113 | if (dev_isalive(net)) |
| 114 | ret = format_addr(buf, net->dev_addr, net->addr_len); |
| 115 | read_unlock(&dev_base_lock); |
| 116 | return ret; |
| 117 | } |
| 118 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 119 | static ssize_t show_broadcast(struct device *dev, |
| 120 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | { |
| 122 | struct net_device *net = to_net_dev(dev); |
| 123 | if (dev_isalive(net)) |
| 124 | return format_addr(buf, net->broadcast, net->addr_len); |
| 125 | return -EINVAL; |
| 126 | } |
| 127 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 128 | static ssize_t show_carrier(struct device *dev, |
| 129 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
| 131 | struct net_device *netdev = to_net_dev(dev); |
| 132 | if (netif_running(netdev)) { |
| 133 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
| 134 | } |
| 135 | return -EINVAL; |
| 136 | } |
| 137 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 138 | static ssize_t show_dormant(struct device *dev, |
| 139 | struct device_attribute *attr, char *buf) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 140 | { |
| 141 | struct net_device *netdev = to_net_dev(dev); |
| 142 | |
| 143 | if (netif_running(netdev)) |
| 144 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); |
| 145 | |
| 146 | return -EINVAL; |
| 147 | } |
| 148 | |
| 149 | static const char *operstates[] = { |
| 150 | "unknown", |
| 151 | "notpresent", /* currently unused */ |
| 152 | "down", |
| 153 | "lowerlayerdown", |
| 154 | "testing", /* currently unused */ |
| 155 | "dormant", |
| 156 | "up" |
| 157 | }; |
| 158 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 159 | static ssize_t show_operstate(struct device *dev, |
| 160 | struct device_attribute *attr, char *buf) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 161 | { |
| 162 | const struct net_device *netdev = to_net_dev(dev); |
| 163 | unsigned char operstate; |
| 164 | |
| 165 | read_lock(&dev_base_lock); |
| 166 | operstate = netdev->operstate; |
| 167 | if (!netif_running(netdev)) |
| 168 | operstate = IF_OPER_DOWN; |
| 169 | read_unlock(&dev_base_lock); |
| 170 | |
Adrian Bunk | e3a5cd9 | 2006-04-05 22:19:47 -0700 | [diff] [blame] | 171 | if (operstate >= ARRAY_SIZE(operstates)) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 172 | return -EINVAL; /* should not happen */ |
| 173 | |
| 174 | return sprintf(buf, "%s\n", operstates[operstate]); |
| 175 | } |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /* read-write attributes */ |
| 178 | NETDEVICE_SHOW(mtu, fmt_dec); |
| 179 | |
| 180 | static int change_mtu(struct net_device *net, unsigned long new_mtu) |
| 181 | { |
| 182 | return dev_set_mtu(net, (int) new_mtu); |
| 183 | } |
| 184 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 185 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
| 186 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 188 | return netdev_store(dev, attr, buf, len, change_mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | NETDEVICE_SHOW(flags, fmt_hex); |
| 192 | |
| 193 | static int change_flags(struct net_device *net, unsigned long new_flags) |
| 194 | { |
| 195 | return dev_change_flags(net, (unsigned) new_flags); |
| 196 | } |
| 197 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 198 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
| 199 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 201 | return netdev_store(dev, attr, buf, len, change_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
| 205 | |
| 206 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) |
| 207 | { |
| 208 | net->tx_queue_len = new_len; |
| 209 | return 0; |
| 210 | } |
| 211 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 212 | static ssize_t store_tx_queue_len(struct device *dev, |
| 213 | struct device_attribute *attr, |
| 214 | const char *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 216 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | } |
| 218 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 219 | static struct device_attribute net_class_attributes[] = { |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 220 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
| 221 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
| 222 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), |
| 223 | __ATTR(features, S_IRUGO, show_features, NULL), |
| 224 | __ATTR(type, S_IRUGO, show_type, NULL), |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 225 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 226 | __ATTR(address, S_IRUGO, show_address, NULL), |
| 227 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), |
| 228 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 229 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
| 230 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 231 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
| 232 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), |
| 233 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, |
| 234 | store_tx_queue_len), |
Kay Sievers | fd586ba | 2005-12-19 01:42:56 +0100 | [diff] [blame] | 235 | {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | }; |
| 237 | |
| 238 | /* Show a given an attribute in the statistics group */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 239 | static ssize_t netstat_show(const struct device *d, |
| 240 | struct device_attribute *attr, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | unsigned long offset) |
| 242 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 243 | struct net_device *dev = to_net_dev(d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | struct net_device_stats *stats; |
| 245 | ssize_t ret = -EINVAL; |
| 246 | |
| 247 | if (offset > sizeof(struct net_device_stats) || |
| 248 | offset % sizeof(unsigned long) != 0) |
| 249 | WARN_ON(1); |
| 250 | |
| 251 | read_lock(&dev_base_lock); |
| 252 | if (dev_isalive(dev) && dev->get_stats && |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 253 | (stats = (*dev->get_stats)(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | ret = sprintf(buf, fmt_ulong, |
| 255 | *(unsigned long *)(((u8 *) stats) + offset)); |
| 256 | |
| 257 | read_unlock(&dev_base_lock); |
| 258 | return ret; |
| 259 | } |
| 260 | |
| 261 | /* generate a read-only statistics attribute */ |
| 262 | #define NETSTAT_ENTRY(name) \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 263 | static ssize_t show_##name(struct device *d, \ |
| 264 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 266 | return netstat_show(d, attr, buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | offsetof(struct net_device_stats, name)); \ |
| 268 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 269 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | NETSTAT_ENTRY(rx_packets); |
| 272 | NETSTAT_ENTRY(tx_packets); |
| 273 | NETSTAT_ENTRY(rx_bytes); |
| 274 | NETSTAT_ENTRY(tx_bytes); |
| 275 | NETSTAT_ENTRY(rx_errors); |
| 276 | NETSTAT_ENTRY(tx_errors); |
| 277 | NETSTAT_ENTRY(rx_dropped); |
| 278 | NETSTAT_ENTRY(tx_dropped); |
| 279 | NETSTAT_ENTRY(multicast); |
| 280 | NETSTAT_ENTRY(collisions); |
| 281 | NETSTAT_ENTRY(rx_length_errors); |
| 282 | NETSTAT_ENTRY(rx_over_errors); |
| 283 | NETSTAT_ENTRY(rx_crc_errors); |
| 284 | NETSTAT_ENTRY(rx_frame_errors); |
| 285 | NETSTAT_ENTRY(rx_fifo_errors); |
| 286 | NETSTAT_ENTRY(rx_missed_errors); |
| 287 | NETSTAT_ENTRY(tx_aborted_errors); |
| 288 | NETSTAT_ENTRY(tx_carrier_errors); |
| 289 | NETSTAT_ENTRY(tx_fifo_errors); |
| 290 | NETSTAT_ENTRY(tx_heartbeat_errors); |
| 291 | NETSTAT_ENTRY(tx_window_errors); |
| 292 | NETSTAT_ENTRY(rx_compressed); |
| 293 | NETSTAT_ENTRY(tx_compressed); |
| 294 | |
| 295 | static struct attribute *netstat_attrs[] = { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 296 | &dev_attr_rx_packets.attr, |
| 297 | &dev_attr_tx_packets.attr, |
| 298 | &dev_attr_rx_bytes.attr, |
| 299 | &dev_attr_tx_bytes.attr, |
| 300 | &dev_attr_rx_errors.attr, |
| 301 | &dev_attr_tx_errors.attr, |
| 302 | &dev_attr_rx_dropped.attr, |
| 303 | &dev_attr_tx_dropped.attr, |
| 304 | &dev_attr_multicast.attr, |
| 305 | &dev_attr_collisions.attr, |
| 306 | &dev_attr_rx_length_errors.attr, |
| 307 | &dev_attr_rx_over_errors.attr, |
| 308 | &dev_attr_rx_crc_errors.attr, |
| 309 | &dev_attr_rx_frame_errors.attr, |
| 310 | &dev_attr_rx_fifo_errors.attr, |
| 311 | &dev_attr_rx_missed_errors.attr, |
| 312 | &dev_attr_tx_aborted_errors.attr, |
| 313 | &dev_attr_tx_carrier_errors.attr, |
| 314 | &dev_attr_tx_fifo_errors.attr, |
| 315 | &dev_attr_tx_heartbeat_errors.attr, |
| 316 | &dev_attr_tx_window_errors.attr, |
| 317 | &dev_attr_rx_compressed.attr, |
| 318 | &dev_attr_tx_compressed.attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | NULL |
| 320 | }; |
| 321 | |
| 322 | |
| 323 | static struct attribute_group netstat_group = { |
| 324 | .name = "statistics", |
| 325 | .attrs = netstat_attrs, |
| 326 | }; |
| 327 | |
Robert P. J. Day | 9d4a604 | 2007-02-05 16:41:36 -0800 | [diff] [blame] | 328 | #ifdef CONFIG_WIRELESS_EXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /* helper function that does all the locking etc for wireless stats */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 330 | static ssize_t wireless_show(struct device *d, char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | ssize_t (*format)(const struct iw_statistics *, |
| 332 | char *)) |
| 333 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 334 | struct net_device *dev = to_net_dev(d); |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 335 | const struct iw_statistics *iw = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | ssize_t ret = -EINVAL; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | read_lock(&dev_base_lock); |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 339 | if (dev_isalive(dev)) { |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 340 | if (dev->wireless_handlers && |
| 341 | dev->wireless_handlers->get_wireless_stats) |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 342 | iw = dev->wireless_handlers->get_wireless_stats(dev); |
Andrey Borzenkov | 6dd214b | 2006-01-09 20:51:28 -0800 | [diff] [blame] | 343 | if (iw != NULL) |
| 344 | ret = (*format)(iw, buf); |
| 345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | read_unlock(&dev_base_lock); |
| 347 | |
| 348 | return ret; |
| 349 | } |
| 350 | |
| 351 | /* show function template for wireless fields */ |
| 352 | #define WIRELESS_SHOW(name, field, format_string) \ |
| 353 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ |
| 354 | { \ |
| 355 | return sprintf(buf, format_string, iw->field); \ |
| 356 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 357 | static ssize_t show_iw_##name(struct device *d, \ |
| 358 | struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 360 | return wireless_show(d, buf, format_iw_##name); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } \ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 362 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | WIRELESS_SHOW(status, status, fmt_hex); |
| 365 | WIRELESS_SHOW(link, qual.qual, fmt_dec); |
| 366 | WIRELESS_SHOW(level, qual.level, fmt_dec); |
| 367 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); |
| 368 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); |
| 369 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); |
| 370 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); |
| 371 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); |
| 372 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); |
| 373 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); |
| 374 | |
| 375 | static struct attribute *wireless_attrs[] = { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 376 | &dev_attr_status.attr, |
| 377 | &dev_attr_link.attr, |
| 378 | &dev_attr_level.attr, |
| 379 | &dev_attr_noise.attr, |
| 380 | &dev_attr_nwid.attr, |
| 381 | &dev_attr_crypt.attr, |
| 382 | &dev_attr_fragment.attr, |
| 383 | &dev_attr_retries.attr, |
| 384 | &dev_attr_misc.attr, |
| 385 | &dev_attr_beacon.attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | NULL |
| 387 | }; |
| 388 | |
| 389 | static struct attribute_group wireless_group = { |
| 390 | .name = "wireless", |
| 391 | .attrs = wireless_attrs, |
| 392 | }; |
| 393 | #endif |
| 394 | |
| 395 | #ifdef CONFIG_HOTPLUG |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 396 | static int netdev_uevent(struct device *d, char **envp, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 397 | int num_envp, char *buf, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 399 | struct net_device *dev = to_net_dev(d); |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 400 | int retval, len = 0, i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 402 | /* pass interface to uevent. */ |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 403 | retval = add_uevent_var(envp, num_envp, &i, |
| 404 | buf, size, &len, |
| 405 | "INTERFACE=%s", dev->name); |
| 406 | if (retval) |
| 407 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Jean Tourrilhes | ca2f37d | 2007-03-07 10:49:30 -0800 | [diff] [blame] | 409 | /* pass ifindex to uevent. |
| 410 | * ifindex is useful as it won't change (interface name may change) |
| 411 | * and is what RtNetlink uses natively. */ |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 412 | retval = add_uevent_var(envp, num_envp, &i, |
| 413 | buf, size, &len, |
| 414 | "IFINDEX=%d", dev->ifindex); |
Jean Tourrilhes | ca2f37d | 2007-03-07 10:49:30 -0800 | [diff] [blame] | 415 | |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 416 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | envp[i] = NULL; |
Eric Rannaud | bf62456 | 2007-03-30 22:23:12 -0700 | [diff] [blame] | 418 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | } |
| 420 | #endif |
| 421 | |
| 422 | /* |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 423 | * netdev_release -- destroy and free a dead device. |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 424 | * Called when last reference to device kobject is gone. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 426 | static void netdev_release(struct device *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 428 | struct net_device *dev = to_net_dev(d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | BUG_ON(dev->reg_state != NETREG_RELEASED); |
| 431 | |
| 432 | kfree((char *)dev - dev->padded); |
| 433 | } |
| 434 | |
| 435 | static struct class net_class = { |
| 436 | .name = "net", |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 437 | .dev_release = netdev_release, |
| 438 | .dev_attrs = net_class_attributes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | #ifdef CONFIG_HOTPLUG |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 440 | .dev_uevent = netdev_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | #endif |
| 442 | }; |
| 443 | |
Stephen Hemminger | 9093bbb | 2007-05-19 15:39:25 -0700 | [diff] [blame] | 444 | /* Delete sysfs entries but hold kobject reference until after all |
| 445 | * netdev references are gone. |
| 446 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | void netdev_unregister_sysfs(struct net_device * net) |
| 448 | { |
Stephen Hemminger | 9093bbb | 2007-05-19 15:39:25 -0700 | [diff] [blame] | 449 | struct device *dev = &(net->dev); |
| 450 | |
| 451 | kobject_get(&dev->kobj); |
| 452 | device_del(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | /* Create sysfs entries for network device. */ |
| 456 | int netdev_register_sysfs(struct net_device *net) |
| 457 | { |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 458 | struct device *dev = &(net->dev); |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 459 | struct attribute_group **groups = net->sysfs_groups; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 461 | device_initialize(dev); |
| 462 | dev->class = &net_class; |
| 463 | dev->platform_data = net; |
| 464 | dev->groups = groups; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 466 | BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ); |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 467 | strlcpy(dev->bus_id, net->name, BUS_ID_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 469 | if (net->get_stats) |
| 470 | *groups++ = &netstat_group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
Robert P. J. Day | 9d4a604 | 2007-02-05 16:41:36 -0800 | [diff] [blame] | 472 | #ifdef CONFIG_WIRELESS_EXT |
John W. Linville | baef186 | 2006-09-08 16:04:05 -0400 | [diff] [blame] | 473 | if (net->wireless_handlers && net->wireless_handlers->get_wireless_stats) |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 474 | *groups++ = &wireless_group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | #endif |
| 476 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 477 | return device_add(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | |
| 480 | int netdev_sysfs_init(void) |
| 481 | { |
| 482 | return class_register(&net_class); |
| 483 | } |